Experiment-Based Separation of Conductor Loss from Dielectric Loss in PCB Striplines


High-speed digital design and signal integrity (SI) engineers need accurate characterization of commercially available printed circuit board (PCB) materials, since this is important for providing technical characteristics of designs and reducing cost-to-quality ratio. PCBs are known to have a substantial level of copper foil roughness. If the roughness effects upon signal propagation are neglected or underestimated, especially at GHz operating frequencies, the dielectric properties extracted with transmission line methods might be misleading and result in significant errors in designs from SI point of view. An experiment-based method to extract frequency-dependent dielectric properties of PCB laminates and separate rough conductor loss from dielectric loss on PCBs with substantial levels of copper foil roughness is proposed. This method is based on the analysis of frequency (ω) components in losses behaving as √ω, ω, and ω2.

Meeting Name

DesignCon 2011 (2011: Jan. 31-Feb. 3, Santa Clara, CA)


Electrical and Computer Engineering

Keywords and Phrases

Conductor Loss; Copper Foils; Frequency-Dependent; High-Speed Digital Design; Operating Frequency; Roughness Effects; Signal Integrity; Signal Propagation; Transmission Line Methods; Copper; Design; Dielectric Devices; Experiments; Organic Pollutants; Printed Circuit Boards; Separation; Dielectric Losses

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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© 2011 UBM Electronics, All rights reserved.

Publication Date

01 Feb 2011

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